Temperature Converter – Convert Temperature Online (Free Tool)
Free online Temperature Converter tool to convert between Celsius, Fahrenheit, and Kelvin. Calculate temperature values for different scales. All conversion happens locally.
Example Output
F = C × 9/5 + 32, validated against the textbook boiling point.
212°F (boiling point of water)
What is Temperature Converter?
Temperature Converter handles the three common scales: Celsius, Fahrenheit, and Kelvin. Unlike most unit conversions which use a simple factor, temperature uses offsets — the tool applies the right formula automatically. Live conversion as you type.
Why use this tool?
- Touch-friendly UI, fine on phones for on-the-go edits
- No registration, account, or installation required
- No API keys to manage and no rate limits to monitor
- Strict and lenient parser modes for handling messy real-world data
- Handles UTF-8 BOM, mixed delimiters, and other edge cases that break simpler converters
How to use
- Enter a temperature value
- Pick from-unit (°C / °F / K) and to-unit
- Result updates as you type — no Convert button
Examples
Recipe — oven temperature
350°F (US recipe) → 176.7°C. Round to 175°C for most ovens with 25° increments.
Weather conversion
-10°C → 14°F. Quick mental rule: F ≈ 2×C + 30 is close enough for weather small-talk.
Scientific use
20°C → 293.15 K. Kelvin is offset by 273.15 from Celsius (same scale size, different zero).
Common use cases
- Recipe conversions when oven uses one scale and recipe another
- Weather small-talk across regions
- Science class / physics homework
- Travel planning between metric and US locations
Troubleshooting
- Negative Kelvin shown.
- Kelvin is absolute — there is no negative temperature. If you see one, your Celsius input is below -273.15°C (below absolute zero), which is physically impossible.
Frequently Asked Questions
To convert Celsius to Fahrenheit, multiply by 9/5 and add 32. For example, 0°C = (0 × 9/5) + 32 = 32°F.
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